Question P6 Number × value
Today’s problem — free all day, every step. Every day has one.
Worker A can complete a job in 5 days. Worker B can complete the same job in 10 days. They work together for 2 days, then Worker A stops. How many more days does Worker B need to finish?
Answer
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One batch repeats. Work out one batch, then multiply.
In this one. Give the job a unit count both times divide into (10), so each worker's speed becomes a whole number of units per day — and rates in the same units add.
Also uses: Same time, same distance
Items are described as a fixed group or ratio that repeats, such as tiles following a pattern, snacks sold in a fixed mix, or a rate given per hour or per item.
Children start from the grand total instead of first working out what one batch is worth. In rate questions they also confuse a duration with a clock time.
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